#include "esp_camera.h"
#include <WiFi.h>
#include "analogWrite.h" // download library from https://github.com/ERROPiX/ESP32_AnalogWrite
//idea from https://www.youtube.com/watch?v=HedMwVT6J3M
//and from https://blog.naver.com/renucs/221393078919


// Select camera model
//#define CAMERA_MODEL_WROVER_KIT
//#define CAMERA_MODEL_ESP_EYE
//#define CAMERA_MODEL_M5STACK_PSRAM
//#define CAMERA_MODEL_M5STACK_WIDE
#define CAMERA_MODEL_AI_THINKER

#include "camera_pins.h"

const char* ssid = "WIFI_NETWORK***";
const char* password = "*****";

void startCameraServer();


// GPIO Setting
int gpLb = 14; //
int gpLf = 15; //
int gpRb = 13; //
int gpRf = 12; //
int led = 4; //
int _speed = 100; //pwm speed
int _light = 10; //light pwm
unsigned long currentMillis;
extern unsigned long last_move_millis;

void setup() {
  
 pinMode(gpLb, OUTPUT); //Left Backward
 pinMode(gpLf, OUTPUT); //Left Forward
 pinMode(gpRb, OUTPUT); //Right Forward
 pinMode(gpRf, OUTPUT); //Right Backward
 pinMode(led, OUTPUT); //Right Backward

 //initialize
 digitalWrite(gpLb, HIGH);
 digitalWrite(gpLf, HIGH);
 digitalWrite(gpRb, HIGH);
 digitalWrite(gpRf, HIGH);
 //analogWrite(led,_light);


  
  
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();

  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = Y2_GPIO_NUM;
  config.pin_d1 = Y3_GPIO_NUM;
  config.pin_d2 = Y4_GPIO_NUM;
  config.pin_d3 = Y5_GPIO_NUM;
  config.pin_d4 = Y6_GPIO_NUM;
  config.pin_d5 = Y7_GPIO_NUM;
  config.pin_d6 = Y8_GPIO_NUM;
  config.pin_d7 = Y9_GPIO_NUM;
  
  config.pin_xclk = XCLK_GPIO_NUM;
  config.pin_pclk = PCLK_GPIO_NUM;
  config.pin_vsync = VSYNC_GPIO_NUM;
  config.pin_href = HREF_GPIO_NUM;
  config.pin_sscb_sda = SIOD_GPIO_NUM;
  config.pin_sscb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;
  //init with high specs to pre-allocate larger buffers
  if(psramFound()){
    config.frame_size = FRAMESIZE_UXGA;
    config.jpeg_quality = 10;
    config.fb_count = 2;
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }

#if defined(CAMERA_MODEL_ESP_EYE)
  pinMode(13, INPUT_PULLUP);
  pinMode(14, INPUT_PULLUP);
#endif

  // camera init
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }

  sensor_t * s = esp_camera_sensor_get();
  //initial sensors are flipped vertically and colors are a bit saturated
  if (s->id.PID == OV3660_PID) {
    s->set_vflip(s, 1);//flip it back
    s->set_brightness(s, 1);//up the blightness just a bit
    s->set_saturation(s, -2);//lower the saturation
  }
  //drop down frame size for higher initial frame rate
  s->set_framesize(s, FRAMESIZE_QVGA);

#if defined(CAMERA_MODEL_M5STACK_WIDE)
  s->set_vflip(s, 1);
  s->set_hmirror(s, 1);
#endif

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  startCameraServer();

  Serial.print("Camera Ready! Use 'http://");
  Serial.print(WiFi.localIP());
  Serial.println("' to connect");
}

void loop() {
  // put your main code here, to run repeatedly:
  currentMillis = millis();
  if(currentMillis - last_move_millis > 500)
  {
    digitalWrite(gpLb, HIGH);
    digitalWrite(gpLf, HIGH);
    digitalWrite(gpRb, HIGH);
    digitalWrite(gpRf, HIGH); 
  }
  delay(100);
}
